US TV
Rex Features
The actors, famous for their respective roles in Angel and Heroes, will be joined by Patricia Arquette, Jon Cryer, Jennifer Love Hewitt, Rob Lowe, Tracy Morgan, Bob Newhart, Josh Radnor and Cobie Smulders at the event.
It was previously announced that Tina Fey and Jon Hamm will also be handing out trophies during the annual awards ceremony alongside a raft of other stars.
The event will be broadcast live on CBS between 8pm and 10pm Sunday, September 20.
Tube Talk
Ultimate 'Simpsons' countdown (20-16)We reveal the results of our Ultimate Simpsons episode countdown.
2012-13 Season
NBC orders 'Hannibal' seriesBryan Fuller drama featuring characters from Red Dragon gets 13-episode order.
US TV Interviews
'Unforgettable' Poppy Montgomery interviewPoppy Montgomery chats to Digital Spy about her role in Unforgettable.
US TV Ratings
Grammy Awards most-watched since 1984The 54th Grammy Awards is seen by over 40 million viewers for the CBS network.
